Cool, a locker up front, and the rear third is already welded, lower gear ratio, this should make quite a difference in the little stinker.
I need to ask a question however, you stated "the tracker i have played with all have 2(1) pin carriers a lock right needs a 4(3) pin" I am not farmiliar with the PINS term. I am awaiting some manuals to arrive that may make the answer obvious, but untill they arrive I am left scratching my head!